2023 Early Hearing Detection & Intervention Conference

March 5-7, 2023 • Cincinnati, OH

<< BACK TO AGENDA

5/24/2018  |   2:45 PM - 3:00 PM   |  SPATIAL AND TEMPORAL TRENDS OF PREY FISH GROWTH AND CONDITION IN LAKE HURON   |  420 B

SPATIAL AND TEMPORAL TRENDS OF PREY FISH GROWTH AND CONDITION IN LAKE HURON

In the 1930s, alewife Alosa pseudoharengus and rainbow smelt Osmerus mordax became important components of the Lake Huron prey fish community. The expansion of alewife resulted in negative impacts to native prey fish species and led to major changes in food webs. Thus, understanding alewife and rainbow smelt life history traits are necessary to manage the fish community. Our objective is to describe spatial and temporal trends in growth and condition of alewife and rainbow smelt in the main basin of Lake Huron. We use time-varying hierarchical models to describe changes in mean length-at-age and condition of both species. Alewife length-at-age exhibited a trend towards smaller sizes from 1980 to 2000 for ages 4 and older while mean length at age 1-3 increased after 2000. Alewife have also exhibited a trend towards “plumper” fish over the time series. No clear spatial or temporal patterns were observed for rainbow smelt. Our results will be used to inform future stock-assessment models in the main basin of Lake Huron.

  • Great Lakes
  • Management
  • Population

Presentation:
This presentation has not yet been uploaded.

Handouts:
Handout is not Available

Transcripts:
CART transcripts are NOT YET available, but will be posted shortly after the conference


Presenters/Authors

Jason Doll (), Michigan State University, dolljas1@msu.edu;


ASHA DISCLOSURE:

Financial -

Nonfinancial -

James Bence (), Michigan State University, bence@msu.edu;


ASHA DISCLOSURE:

Financial -

Nonfinancial -

Stephen Riley (), U.S. Geological Survey, Great Lakes Science Center, 1451 Green Road, Ann Arbor, Michigan 48105 United States, sriley@usgs.gov;


ASHA DISCLOSURE:

Financial -

Nonfinancial -

Edward Roseman (), U.S. Geological Survey, Great Lakes Science Center, 1451 Green Road, Ann Arbor, Michigan 48105 United States, eroseman@usgs.gov;


ASHA DISCLOSURE:

Financial -

Nonfinancial -

Timothy O'Brien (), U.S. Geological Survey, Great Lakes Science Center, 1451 Green Road, Ann Arbor, Michigan 48105 United States, tiobrien@usgs.gov;


ASHA DISCLOSURE:

Financial -

Nonfinancial -